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Right you are Tony,
That will teach me to post numbers from memory. I no longer use the black paste because I don't think it improves the edge of a razor that has been finished on a coticule. ...

From my experience, Jeff hit the nail on the head. I have used diamond compounds (1.0, 0.5, and 0.25) as well as the 'black diamond' paste sold by Keith at Hand American (not diamond at all, but...